JP4919619B2 - Butterfly water level control valve - Google Patents

Description

  The present invention relates to a butterfly-shaped water level adjustment valve, particularly a butterfly-shaped valve that opens and closes a flow path by a butterfly valve by operating a gear by following up and down of a float in a reservoir, a reservoir, a water tank, a depressurized water tank, etc. It relates to a water level adjustment valve.

  Conventionally, a water level adjusting valve that operates a butterfly valve by driving the gear as described above uses a sector gear as its gear. In general, when operating a butterfly valve by gear drive, if it is deployed outdoors, if the gear mechanism is trapped by foreign matter such as straw debris, fallen leaves, or wood chips floating or flying on the surface of the water, the gear mechanism will malfunction. It becomes a cause.

Therefore, as shown in the patent document presented by the applicant, there is a structure that covers the meshing portion of the sector gear, but in order to allow rotation of the lever formed with the sector gear at the tip, it is absolutely necessary to cover that portion Thus, it is necessary to provide a through-hole that is open, and it is impossible to completely prevent the foreign matter from entering the gear mechanism from the open portion of the through-hole.
JP-A-6-272787 JP 11-344149 A

  The problem to be solved by the present invention is that a butterfly-shaped water level adjustment valve using a conventional gear mechanism inevitably has an open hole in the cover (case) of the gear mechanism, so that foreign matter can be completely prevented from entering. It cannot be prevented, and is a cause of malfunction.

In order to solve the above-mentioned problems, the butterfly-shaped water level regulating valve according to the present invention has a support rod provided with a float that follows the fluctuation of the water level below, and a lever rod is pivoted near the upper end of the support rod. A gear mechanism for driving a butterfly valve body pivotally supported in the valve box is connected to the tip of the lever rod, and the entire outer periphery of the gear mechanism is covered with a cover body in an airtight manner. Is a butterfly level control valve equipped with a float stopper with a play interval, and the gear mechanism described above is a pinion connected to the tip of the lever と and an internal gear in which the pinion is inscribed, and is synchronized with the internal gear. The valve shaft of the butterfly valve body is connected through a connecting plate that rotates in this manner.

In addition, the butterfly-shaped water level adjusting valve according to the present invention is characterized in that at least one stopper of the lever rod is provided on the outer surface of the cover body of the gear mechanism.

The butterfly water level adjusting valve according to the present invention is configured as described above. Therefore, according to the first aspect of the present invention, the gear mechanism is completely covered, and there is no possibility of foreign matter intruding, so that an airtight covering structure of the complete gear mechanism can be specifically realized. It will be possible.

Further, according to the second aspect of the present invention, when there is a float at the assumed maximum and minimum water level positions, it is possible to prevent the butterfly valve from operating beyond that .

  This is realized by configuring as in the embodiment shown in the drawings.

  Next, an example of a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a butterfly water level adjusting valve embodying the present invention, FIG. 2 is a partially cutaway front view showing the gear mechanism portion, and FIG. 3 is a side sectional view showing the gear mechanism portion.

  In these drawings, 1 indicates a float, and FIG. 1 indicates a state where the water level is at the highest level. The float 1 is mounted below the support rod 6 with the support rod 6 penetrating therethrough, and is slidable along the support rod 6.

  In addition, stopper rings 7a and 7b above and below the float 1 are brought into pressure contact with the outer surface of the support rod 6 by means of stopper screws 7a and 7b penetrating from the outer periphery of the stopper rings 7a and 7b. In particular, the lower stopper ring 7b is spaced apart from the lower surface of the float 1 by a play interval. Especially when the float 1 is at the highest water level, the play is not affected even if it is lowered by the influence of waves. Absorption is performed at intervals, so that a minute operation of the butterfly valve 4 described later is not caused.

  Furthermore, a portion near one end of the lever rod 2 is pivotally attached to the upper end of the support rod 6 by a pivot pin 9. A ring nut 10 is integrally provided at the tip of the pivot pin 2.

  On the other hand, reference numeral 11 denotes a cover body of a gear mechanism, which will be described later. The cover body 11 is formed in a substantially cylindrical shape, and has a disk shape with an approximately the same diameter as an annular flange 11a formed in one opening. The lid plate 12 is airtightly fixed with bolts 13.

  Further, the lid plate 12 is provided with a through hole at a slightly eccentric position from its center, and a bush 14 is fitted into the through hole. The above-described ring nut 10 is aligned with the projecting end surface of the bush 14 in an overlapped state, and a bolt member 15 passing through the bush 14 is screwed to the ring nut 10 and is fixedly mounted via a retaining member. Has been.

  A small-diameter pinion 3 is screwed and fixed to the distal end portion of the bolt member 15, and the pinion 3 is meshed with an internal gear 3 a arranged concentrically with the cover body 11. On the back side of the internal gear 3a, a connecting plate 16 having substantially the same size as the outer diameter of the internal gear 3a is fixed by screws 17a via bushes 17 and 17.

  Further, the central portion of the connecting plate 16 is fitted into a supporting hexagonal cylinder 18, and this hexagonal cylinder 18 is fitted into a valve shaft 20 extending from the inside of the valve box 19 and is screwed. The stopper 21 and the washer 22 prevent it from coming off.

  In the present embodiment, the hexagonal cylinder 18 is used, but this is for transmitting the rotational force of the internal gear 3a to the valve shaft 20 via the connecting plate 16, and has an engaging property. Of course, other rectangular cylinders, elliptic cylinders, and the like can be substituted.

  The above-described valve shaft 20 is inserted into a guide pipe 23 formed integrally with the valve box 19, and the butterfly valve body 4 is attached to the base end portion of the valve box 19. Further, the flange 23a at the opening edge of the guide pipe 23 is brought into pressure-contact with the opening edge of the through hole 11b formed in the cover body 11, and the fitting step portion 23b formed at the inner edge of the flange 23a in the through hole 11b. Is inserted. A guard ring 24 that surrounds the periphery of the valve shaft 20 and maintains airtightness is fixed to the fitting step portion 23b with a screw.

  In the figure, 25 and 25 are control stoppers of the lever rod 2 fixed on the surface of the cover plate 12, and when the float 1 moves up and down to a certain water level position, the lever rod 2 is pivoted beyond it. It is possible to suppress the operation of the butterfly valve body 4 at a constant water level.

  The butterfly water level regulating valve according to the present invention is configured as described above. Here, this operation will be described. When the float 1 moves up and down with the displacement of the water level, the support rod 6 also moves up and down in synchronization, and the lever rod 2 pivotally attached to the support rod 6 is pivoted. At that time, the pivoting movement of the lever rod 2 is transmitted to the pinion 3 via the bolt member 15, and this pinion 3 rotates the meshed internal gear 3a. This rotational force is transmitted to the valve shaft 20 via the connecting plate 16 and the hexagonal cylinder 18 to open and close the butterfly valve 4.

  And since the above-mentioned gear mechanism is airtightly covered with the cover body 11 and the cover plate 12, it has a structure in which foreign matter does not enter the gear mechanism and bite into it to cause malfunction.

  Since the present invention has the above-described structure, the present invention can be widely applied to a device that drives a swinging, rotating, or rotating object without being particular about the butterfly water level adjusting valve, and the float is replaced with a weight. However, it can be used to open and close an article discharge door and a ventilation window, and it is possible to completely prevent foreign matter from entering the gear mechanism.

It is a front view which shows the butterfly-shaped water level adjustment valve which implemented this invention. It is a partially broken front view which shows a gear mechanism part. It is a sectional side view which shows a gear mechanism part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Float 2 Lever rod 3 Pinion 3a Internal gear 4 Butterfly-shaped valve body 6 Support rod 7a Stopper ring 7b Stopper ring 8 Set screw 9 Pivot pin 10 Ring nut 11 Cover body 11a Flange 11b Through-hole 12 Cover plate 13 Bolt 14 Bush 15 Bolt member 16 Connecting plate 17 Bush 17a Screw 18 Hexagonal cylinder 19 Valve box 20 Valve shaft 21 Screw 22 Washer 23 Guide pipe 23a Flange 24 Guard ring 25 Control stopper

Claims (2)

A butterfly valve body having a support rod with a float that follows the fluctuation of the water level below, a lever 桿 pivoted near the upper end of the support rod, and pivotally supported in the valve box at the tip of the lever 桿In the butterfly-shaped water level adjustment valve, the gear mechanism for driving the gear mechanism is connected, the entire outer periphery of the gear mechanism is covered with a cover body, and the support rod is provided with a float stopper with a play interval. The gear mechanism is a pinion connected to the tip of the lever 桿 and an internal gear that is inscribed in the pinion, and the valve shaft of the butterfly valve body is connected via a connection plate that rotates in synchronization with the internal gear. A butterfly-shaped water level regulating valve. The butterfly-shaped water level adjusting valve according to claim 1, wherein at least one stopper of the lever rod is provided on the outer surface of the cover body of the gear mechanism .

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